Most African countries see masks as intercessor between the land of the living and the supernatural land of the dead, ancestors and other entities.Generally known as "the gods" Masks are now the attribute of a dressed up dancer usually known as "the masquerades" they gives it life and word at the time of ceremonies,like festivals,etc
in other words it's called THE SECOND FACE. these is an example:

Welcome to the African Tribal Masks Blog.

There are many types of masks in the world,but there are unique masks, so this blog is talking about African tribal masks. masks according to different african tribes.